[UNIX] ImgSvr Directory Traversal

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ImgSvr Directory Traversal
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SUMMARY

<http://adaimgsvr.sourceforge.net/> ImgSvr is "a personal or corporate
Embedded Picture Web Server that let's you efficiently browse digital
pictures. Contrary to other gallery systems, imgsvr aimed to be an easy
and fully dynamic picture server, no static created thumbnails are
created". A vulnerability within the ImgSvr allows remote attackers to
access files that reside outside the bounding root directory of the web
server.

DETAILS

It is possible to pass a value in the template parameter of requests to
ImgSvr which causes arbitrary files to be returned from outside of the web
root as follows:
GET /?template=../../../../../../../../../../etc/passwd HTTP/1.0

Impact:
An attacker could cause access to arbitrary files.

ADDITIONAL INFORMATION

The information has been provided by Tim Brown - Portcullis Computer
Security Ltd.

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